Lip turning machine



March 7, w33- H. l.. cHAPlN LIP TURNING MACHINE Filed March 16, 1931 2 Sl'lees-Sheekl 1 March 7, N333. H, 1 cHAPlN LIP TURNING' MACHINE 2 Sheets-Sheet 2 #WEA/70p Patented Mar. 7, 1933 UNITED vSTATES HERBERT I.. CHAPIN, or swAMrsco'rrgMASSACHUSETTS, AssIGNoE 'ro UNITED srIoE MACHINERY coEroEAfrIoN, E I'ArEEsoN, NEW JERSEY, A coEroEArIoN or NEW y JERSEY PATENT ori-ICE LII TuIiNING MACHINE Applicationniea March 16,1931.' i seriai'No. 522,983.

. This invention relates to improvements in lip turning or channel opening machines and is herein illustrated as embodied lin a lip turning machine having, a rotary lip turning tool.

One object of the present invention'is to improvethe construction and mode of operation of lip turning tools of the rotary type to facilitate efficiency of operation and insure uniformity of results irrespective of variations in the character of the-material acted upon .as well as to-eliminate the danger ofburnishing orglazing the surface of the lipin such away as to interfere with the ceinenting of the lip after the sole has been stitched to the upper of the shoe. n

A vWith this object in view, a feature of the invention consists in the'provision, in a inachine of the class described', ofl a rotary lip turning tool comprising ameinber constructed and arranged to engage the lip of a channeled sole held against .and fed past the tool and to exert wiping pressure upon the lip in directions lengthwise of the lip and latwise of the sole to open the channel and turn the lip over toward the face ofthe sole and to exert vedgewise pressure yieldingly to form avshoulder at the base of the lip. As herein illustrated, a plurality of lip-engaging members are pivotally mounted upon a rotary Acarrier or hub, the arrangement being such that the-members are urged outwardly by the action of centrifugal force as the hub rotates and are capable of yielding inwardly as the worlr is pressed against them.' Eachof the illustrated pivotally mounted members is provided'with a lip-engaging surface, a portion of which is shapedand' arranged to enter the channel in a sole and to turn the lip of the channel by wiping over the face of the lip, and a portion of which is shaped and arranged to strike alight blow against the base of the lip in a direction substantially perpendicular to the edge of the sole and thereafter to wipe along the lip with a yielding rubbing action adapted to form a welldefined shoulder at the base of the lip without danger of burnishing the lip.

. The invention further consists in features rv P3 of vconstruction and combinations .and arrangements of parts hereinafter described and claimed.

, The invention will be explained with; reference to the accompanying drawings, in which4 Y Y Fig. l is aside elevational view of aI portion of a lip turning or channel opening machine lhaving my improved .lip turning tool applied thereto; n

Fig'.` 2y is a side elevational view ofthe tool shown in Fig. l, illustrating itsmod'e of operation upon'the sole of a shoe;

Fig. 3 is a bottom plan view of the tool, partially broken away;

Fig. 4- is a'vertical sectional view taken y,

along the line IV-IV ofV Fig. 3;

Fig. 5 is a sectional view taken along the line V-V of Fig. '2 but showing the lip turning blades in their inner or non-expanded positions;

Figs. 6 and 7 are elevational views of one of the lip turning blades constituting the lip turning tool, showing the blade as it appears from two different points of view;

Fig. 8 is a perspective view showing the tool in operation upon the'outsole of a shoe;

Fig. 9 is a sectional view similar-to Fig. 3 but illustrating the tool as it appears wheny in operation upon a piece of work;

Fig. 10 is alrview, partially in vertical section'and partially in side elevation. of a tool of modified construction, showing the tool in operative relation to a piece of work;

Fig. ll is a perspectiveview of a shoe illustrating the appearance of the channel lip after it has been operated upon by the improved lip turning tool; and

Fig. 12 is a diagrammatic view illustrating certain characteristics in the mode of operation of the tool.

In Fig. 1 of the drawings, a rotary lip turning toolis shown as being applied to a lip turning or channel opening machine of a type commonly employed to open the channel and lay back the channel lip or iiap of the outsole of `a shoe after the outsole has been rough-rounded and channeled in the usual way. The lip turning tool, which is shown at 12 in the drawings, is iXedly secured upon the lower en d of a spindle 14 which is journaled in vertical bearings 16 formed in a frame or head 18. A pulley 20 secured to the spindle 14 between the bearings 16 is adapted to receive a belt 22 for driving the spindle.

The lip turning tool 12 comprises a cylindrical carrier or hub 24 and three' elongated lip turning members or blades 26 which are pivotally mountedfon the hub 24 with provision for a limited amount of outward swinging movement under the action of centrifugal force while the spindle 14 ,is being` rotated. As shown, a bore 28 is formed "in the upper portion of the hub 24 for receiving the spindle 14 while the lower portion of the hub is reduced in diameter where the lip turning blades are located and is counterboredV and tapped to receive a screw 80, the head 82 of which assists in holding the blades 26 in place on the hub and functions in gaging the position of the work'relatively to the blades as will hereinafter appear.

`The illustrated blades 26 are shaped, las best shown in Fig. 5, to Jfacilitate the compact arrangement of the blades around the reduced lower portion of the hub 24, each blade having Yan outer lateral face 34 which is con vex lengthwise of the blade, and a longitudinally concave inner lateral face 36 curved to correspond to the curvature of the reduced lower portion of the hub 24. As shown, each lip turning blade 26'has a fiat upper face 38 (Figs. 5', 6 and 7) adapted to engage an annular shoulderr 40 on the hub 24 which forms a thrust bearing for the blades and a pivot stud 42 projects upwardly from each blade, the stud being formed integrally with the blade at one end of the latter. The blades are assembled, as shown in Fig. 5, in spaced relation around the reduced lower extremity of the hub 24 with the pivot studs 42 received and adapted to turn in vertical bores 44 in the upper portion of the hub. The 'pivot studs 42 are retained in the bores 44 by the screw head or gage member 32, the margin of which supports the blades 26 by engagement with arcuate ribs 46 which are yformedV on the blades to assist in the lip turning operation as will be explained. The inner faces of the blades 26 are relieved at 48 (see Fig. 5) to permit the blades to move outwardly about their pivots 42 und'er the action of centrifugal force as the tool is being rotated. To limit the outward movement of the lip turning blades about their pivot studs there is associated with each blade a stop screw 50 which extends vertically through the upper portion of the hub 24.

Each stop screw 50 is formed with a conical lower extremity 52 adapted 'to project into a complemental recess 54 in the respective lip turning blade and to engage a portion of the wall of the recess which constitutes a stop shoulder to cooperate with the stop'screw. By turning the screws 570 associated with the spondingly varied. As shown, lock nuts'56 may be providedV on the screws 50 for securing the screws in adjusted position. y

To enable the blades 26 to perform .the desired lip turning operation, each blade is further provided with a curved lower face 58 for engaging the under side of the lip, as

best shown in Figs. 2, 6 and 8. This face 58 of each lip turning blade slopes downwardly lengthwise of the'bladefrom the pivoted endv of the blade (which is the portion which first comes intoengagement with the lip as the tool rotates in the direction of the arrow in 4' Fig. 8) toward the rear portion of the blade, the'angle of slope becoming progressively less abrupt until the face 58 merges with a substantially horizontal surface 60 atfthe rear extremity ofthe blade. ln a direction crosswise of the blade the slope of the face 58 becomes progressively less abrupt from front to rear of the blade and at its inner extremity the face 58 blends gradually with the substantially vertical outer face of the rib 46. vIt will thus be'seen that the curvaturel of the lip-engaging surface of each blade 26 is similar to that at one sideof the bow of a boat. In the operation of the tool, the lip-engaging faces 58 of the blades 26 function to raise the lip to an upright position and gradually to turnit backwardly and downwardly toward the facel of the sole, whilethesubstantially horizontal surfaces 6() function to set the lip in its backwardly turned position, which4 position is illustrated in Fig. 2. The outer surfaces of the ribs 46 cooperate with the periphery of the screw head or gage member 32 to define an upright shoulder at the base of the lip. As shown in Fig. 2, theperiphery of the gage member 32 acts upon that portion of the base of the lip which is below the upper surface of the sole, while the faces of the ribs 46 act upon that portion ofthe base of the lip which is above the upper face of the sole. The member 32, bly engagement with'the unyielding lowermost portion of the lip, functions effectively toV gage the position of the lip with respect to the lipA turning blades. rlhe slight bevel of the periphery of the member 32, and the fact that the latter presents an u'nyielding surface to the material at the base of the lip, tends toprevent that member from riding out of the channel. The fact that the blades 26 are capable of yielding inwardly after coming into engagementwith the lip enables each blade toy remain in contact with the lip for a longer interval of time, and tohave a greater area of Contact with the lip at each rotation of the tool Ies than if the blades were unyieldingly mounted. Thus, the blades are` enabled to exert a yielding rubbing or wiping action upon theflip which is not only more eective for the purpose of turning andv setting the lip but also has practically no tendency to glaze or burnish the surface of the lip. The interval of time during which each blade remains in rubbing contact with the lip at each 'rotation ofv the tool being dependent upon the amount which the blade is permitted to yield inwardly, that interval may be varied by adjusting the extent ofmovemen't of the blades by means of the screw 50.

In Fig. 10 there is shown a lip turning tool of modified construction wherein provision is made for Vgaging the location of the work relatively to lthe tool from the inwardly yielding blades themselves instead of from a non-yielding member such as thescrew head or gage member l32 hereinbefore described.

`As shown 'in Fig. 10, the lip turning blades which are indicated at 260 and which are pivotally mounted upon the carrier or hub 240 in the same manner as that already de-` scribed is provided with ribs 460 which project downwardly to the lowermost extremity of the tool for engagementwith that portion at the base of the lip which lies below the upper surface of the sole. As shown, also, the heightwise curvature of the outer or lipengaging surfaces of the rib 460 is'such as to provide a slightly undercut surface for engagement with the base of the lip, such a construction causing the ribbed lower portions of the blades'to have a tendency to prevent the ribs `from 4accidentally being forced out of the channel and the -toolbeing displaced from the desired operative relation .with the -lip of the sole. In this modified construction the lip turning blades' are supported and heldin their proper positions with respect to the hub 240 by means of an annular liange 462 on a screw OOwhich is threaded into the tappedlower portion of the spindle-receiving bore 288 in thevhub240.`

In presenting a shoe to the macliine,-the operator manually'raises the channel lip at the end of the channel where the lip vturning operation is to begin and engages the root of the channel with the periphery ofthe gage member 32. As the tooll 12 rotates, the curved work-engaging surfaces of the blades 26 wipe across the face of the channel lip, raising the lip to an upright position and turning it backward toward the face of the sole, and applying anv unyielding pressure tending to set the lip in its backwardly turned positio-n. Thev outer face of each rib 46 strikes a light blow against the material vat the base of the Ylip and thereafter exerts a yielding wiping pressure which results in defining a shoulder at the base of the lip without, however, exerting any tendency'to glaze or burnish that portion of the lip.

above) and the work is drawn past the tool in the general direction of movement of the lip turning .blades where the latter engage the work. Thus, the rotation of the tool facilitates the feeding of the work. The periphery' of the gage member 32 provides an 'unyielding abutment for engagement with the material at the bottom of the channel in the sole. Because of the lpivoted mounting of the lip turning blades the latter are swung outwardly and thus the lip engaging porv tions of the tool are radially expanded while the tool is rotating, with the .result that the lip engaging surfaces yield inwardly as the work is pressed against them. Thisyielding of the lip engaging surfaces results in reducing .tov a minimum anyvibration imparted by the tool-,to the Work and'thus makes it easier for the operator to handle the Work to prevent the tool from ridingout of the channel. Moreover, because of the yieldf ing of the lip turning blades the normal circular path of movement of the 'blades 1s modifiedV as the work is pressed against the blades. f l,

Because ofthe modification of the path of movement ofthe lip turning blades a particularly advantageous result is accomplished with regard tothe action of the tool upon the relatively. thick and toughy base portion of the lip of the sole. -The' action of they tool upon this portion of the lip will be explained with special reference to Figs, 6 and 12. As hereinbefore set forth, it is the ribportion 416 of the lip turning blade 26 which operates upon the base of the lip o f the sole. The portion of the rib 46 which en# gages the lip is the portion located between the points H and I in Figs. 3 and'6, that portion comprising a` surface which is concentricl with Vthe axis of the tool when the lip turning .blade occupies its inner or non-expanded position. The lip turning blade 26, however, occupies its outer or expanded position when it first engages the work at a point corresponding approximatelyl to the point I-I. The blade 26 thenmoves inward'- ly under the pressure of the work and nally leaves the work approximately at vthe point I. The paths of the point H (which may be referred to as the striking point) and of the point I (which may be referred toas the leaving point) are indicated diagrammatically by the dotted lines J and K, respectively, in Fig. l2. In that ligure, the-edge of a sole Vwhich is kbeing operated upon is: yindicated at L, the base of the channel lip at M,

andthe edge of the lip, after thelip has been ill() The concentric portion of the curved face of the rib a6 which lies between the points II and I then wipes across the base of the lip of the sole, after which the leaving point I travels through a straight path from P to Q inyielding engagement with the work. The lip turning blade is thus maintained :in yielding wiping engagement with the base of the lip for a substantial portion of each rotation of the tool and is made effective to turn the lipin such a manner as entirely to uncover the stitch-receiving groove M, and to produce av well-defined shoulder at the base of the lip, and thus to insure against any interference by the lip with the stitching operation which is subsequently to be performed upon the sole. Because of the fact that the lip turning bladeengages the work yieldingly, however, it has no tendency to glaze or burnish the lip in such a way as to interfere with effective cementing of the lip after the sole'has been stitched to the shoe and the lip has been laid to close the channel and conceal the stitches.

I-Iaving described my invention, what I claim as new and desire to secure by Letters Patent of the United Stat-es is:

1. In a lip turning machine, a rotary lip turning tool comprising a member constructed and arranged to engage the lip of a channeled sole held against and fed'past the tool and to exert'wiping pressure upon the lip in directions lengthwise of the lip and liatwis'e of the sole to open the channel and turn the lip over toward the face of the sole and to exert edgewise pressure yieldingly to form a shoulder at the base of the li p2. In a lip turning machine, a rotary lip turning tool comprising a member constructed and arranged to engage the lip of a channeled sole held against and fed past the tool and to exert wiping pressure upon the lip in directions lengthwise of the lip and both atwise and edgewise of the sole to open the channel and turn the` lip over toward the face of the sole and to form a shoulder at. the base of the lip, said member being mounted to yield edgewise of the sole assaid tool rotates.

3. In a lip turning machine, a rotary lip turning tool comprising a member constructed andarranged to engage the lip of a channeled sole held against and fed past the tool and to exert wiping pressure upon the lip in directions lengthwise of the lip and both latwise and edgewise of the sole to open the channel and turn the lip overI toward the 4. In a lip turning machine, a rotary turning tool comprising a member `constructed and arranged to wipe across the lip of a sole in directions lengthwise of the lip and iatwise of the sole to press th-e lip toward the face of the sole and to apply yield.

ing pressure to the base of the lip in a direc` tion substantially perpendicular to the edge of the sole. v i. Y

5. In a lip turning machine, a rotary lip turning tool comprising a carrier, and a member on saidv carrier constructed and arranged to strike a blow against the lip of a sole to form an upstanding-shoulder at. the base of the lip, and to exert wiping pressure upon the face of the lip in directionsbothhflatwise and edgewise of the sole to turn'the lip toward the face of the sole. l Q

l6. In a lip turning machine, a lipturning tool comprising a member mounted torevolve g about an axis substantially perpendicular to the face of a lipped sole `being operated upon and having a surface shaped and arranged to strike a blow at the base of the lip ateach rotation of the tool. f f 7 In a lip turning machine, a lip turning tool comprising a member mounted torevolve about an aXis substantially perpendicular to the face of a lipped sole being operated upon and constructed and arranged to wipe. across the body portion of the lip and to strike a blow at the base of thelip at each rotation of the tool.

. 8. In a lip turning machine, a lip turning tool comprising a member mounted to revolve zi,

about an aXis substantially perpendicular to the face of a lipped sole being operated upon to strike a blow at the base ofthe lip and thereafter to wipe yieldingly along'the base of the lip in a direction lengthwise ofthe lip at each rotation ofthe tool. y

9. A rotary lip turning tool having a lip engaging member. constructed and arranged to exert wiping pressure in two directions substantially perpendicular to each other, the i" tool being mounted so that the pressurein one direction is unyielding and the pressure in the other direction is yielding.

l0. A lip turning tool comprising a hub,

a lip turning blade mounted on the hub and y arranged to be held outwardly by centrifugal force and to yield inwardly while the hub is rotating, said bladehaving a lip engaging surface shaped to raise the lip of a channel in a sole to turn the lip over toward the face of the sole and simultaneously to rub yieldingly along the base of the lip.

11. A. rotary lip turning tool comprising a hub, a plurality of lip turning blades pivotally mounted on the hub and arranged to swing outwardly under the influence of centrifugal force about axes substantially perpendicular to the face of a sole being operated upon by the tool, and means for limiting the outward movement of said members.

12. A lip turning tool comprising a hub, a lip turning blade pivotally mounted on the hub and arranged with its pivotal axis substantially parallel to the axis of the hub, said blade having a lip engaging surface shaped to raise the lip of a sole and to turn the lip over toward the face of the sole and simultaneously to rub yieldingly along the base of the lip. l

13. A lip turning tool comprising a rotary carrier, a lip turning member mounted onsaid carrier and adapted to move outwardly under the action of centrifugal force as said carrier rotates, a stop screw on said carrier for engaging said member to limit outward movement of the member to an extent variable in accordance with the adjustment of said screw, and means for locking the stop screw in adjusted position.

14. A lip turning tool comprising Ia hub, a lip turning blade pivoted for swinging movement about an axis parallel to the axis of rotation of the hub and having a recess in one side of the blade, anda screw carried by the hub and having a conical extremity arranged to project into said recess in said blade to limit the outward movement of the blade about its pivotal axis to an extent variable in accordance with the adjustment of the screw.

15. A rotary lip turning tool comprising a hub having a reduced portion, a plurality of lip turning members surrounding the periphery of said reduced'portion, each of said members having a pivot stud received in a bore in the main portion ofthe hub and arranged to permit outward movement of said members under the influence of centrifugal force as said tool rotates, and means for retaining said members in assembled relation with said hub.

16. In a lip turning machine, a rotary lip turning tool comprising a member constructed and arranged to raise the lip of a sole and to wipe along the base of the lip in a direction lengthwise of the lip, said member being mounted to yield to extend the area of contact of said member with the base of the lip at each rotation of said tool.

17. In a lip turning machine, a rotary lip turning tool comprising a member constructed and arranged toraise the li of a sole and to wipe along the base of the ip in a direction lengthwise of the lip, said member being mounted to yield to extend the area of contact of said member with the base of the lip at each rotation of said tool, and unyielding means engageable with the base of the lip for gaging the position of the work relatively to said member.

"518." In a lipturning machine, means con-- structed and arranged to raise a lip of a sole -ber and movable under the influence of cenrtrifugal force, -said wiper member having surfaces shaped and relatively arranged for: f

exerting wiping pressurefagainst the lip of the sole in directions both flatwise and edgewise of the sole.

20. In a lip turning machine, a rotary carrier, a lip turning member on said carrier shaped and arranged to' enter a channel in a sole and to engage the base of the channel lip to position the lip relatively to the tool, and a. plurality of lip turning blades pivoted for swinging movements about axes parallel to the axis of rotation of said carrier, and having lip engaging surfaces shaped and arranged to raise the channel lip and turn it backwardly toward the face of the sole, and means for rotating said carrier.

21. A rotary lip turning tool comprising a hub havingal reduced portion, a plurality of lip turning members surrounding the periphery of said reduced portion, each of said members having a pivot stud receivedin a bore in the main portion of the hub and arranged to permit outward movement of said members under the influence of centrifugal force as said tool rotates, and means fixed to said hub and engageable Awith said ,members for holding the latter in place, said means having a circular periphery engageable with the base of the lip to gage the position of the work relatively to said tool.

22. In a lip turning machine, a driven shaft, a hub on saidshaft, a plurality of lip turning members mo'unted on said hub and adapted to be held normally in an outer position by the action of centrifugal force while said shaft is rotating and to yield inwardly.

to the pressure of the work, and a. disk lixed to said hub and arranged to have peripheral engagement with the material at the rootof the channel to gage the position of said members relatively to the work.

, 23. In .a lip turning machine, a driven shaft, a hub on said shaft, a plurality of lip turning members mounted on said hub and adapted to be held normally in an outer position by the action of centrifugal force while said shaft is rotating and to yield inwardly to the pressure of the work, and a disk fixed to said hub and arranged to have peripheral engagement with the material at the root o'f the channel'to gage the position of said members relatively to the work, said disk having 'lll abeveledperipliery tending to` prevent the disk from riding out of the channel.

24. A rotary lip turning tool` comprising a hub, a plurality of lip turning blades pivotally mounted on the hub and constructed and arranged to be held in an outer position under the action of centrifugal force While the tool is rotating and to yield to the pressure of the Work, and a non-yielding gage arranged to engage the base of the lip of a. sole to position the lip relatively to said blades. y v

. ln testimony Whereof'l have signed my naine to this specification.

' HERBERT L. CHAPIN. 

